阳离子触发的Domino Aza-Piancatelli重排/ Friedel-Crafts吲哚系呋喃基醇的烷基化反应,从而获得环辛基[ b ]吲哚生物碱核心
摘要:
开发了一种通过aza-Piancatelli重排/ Friedel-Crafts烷基化级联反应桥接多环[ b ]吲哚酮的多米诺方法。这种转化是通过在路易斯酸存在下使吲哚链连接的2-呋喃基甲醇与取代的苯胺反应以引发aza-Piancatelli重排,然后进行原位分子内Friedel-Crafts烷基化反应以在一个罐中获得桥联的四环骨架而实现的。
阳离子触发的Domino Aza-Piancatelli重排/ Friedel-Crafts吲哚系呋喃基醇的烷基化反应,从而获得环辛基[ b ]吲哚生物碱核心
摘要:
开发了一种通过aza-Piancatelli重排/ Friedel-Crafts烷基化级联反应桥接多环[ b ]吲哚酮的多米诺方法。这种转化是通过在路易斯酸存在下使吲哚链连接的2-呋喃基甲醇与取代的苯胺反应以引发aza-Piancatelli重排,然后进行原位分子内Friedel-Crafts烷基化反应以在一个罐中获得桥联的四环骨架而实现的。
utility of indoles. In continuation of our research interest in green oxidative cyclization of indoles with Oxone-halide. Here we report an oxidative cyclization of hometryptamine and hometryptophol derivatives using KI/oxone, enabling efficiently access to spiro-heterocyclic oxindoles incorporating tetrahydrofurans, pyrrolidines, pyranones, furanones, and lactams would be difficult to prepare by other
Diradical Polar Reactivity Induced by Electricity‐Mediated Ground State Triplet Nitrenium Species
作者:Nakshatra Banerjee、Apoorv Kushwaha、Shiv Dutt、Debarshi Saha、T. J. Dhilip Kumar、Prabal Banerjee
DOI:10.1002/adsc.202301494
日期:2024.7.2
reactive intermediates to possess a groundstatetriplet character. Excited statetriplet intermediates are generally accessed by means of photon transfer from a tunable light source or by using any triplet sensitizers. N‐acyl N‐alkoxy nitreniums are an important class of reactive intermediates in the synthetic organic community due to their prolonged lifetime and ground‐state singlet character. Herein, we
Indole-Derived Psammaplin A Analogues as Epigenetic Modulators with Multiple Inhibitory Activities
作者:Raquel Pereira、Rosaria Benedetti、Santiago Pérez-Rodríguez、Angela Nebbioso、José García-Rodríguez、Vincenzo Carafa、Mayra Stuhldreier、Mariarosaria Conte、Fátima Rodríguez-Barrios、Hendrik G. Stunnenberg、Hinrich Gronemeyer、Lucia Altucci、Ángel R. de Lera
DOI:10.1021/jm300618u
日期:2012.11.26
A SAR study has been carried out around a modified scaffold of the natural product psammaplin A obtained by replacing the o-bromophenol unit by an indole ring. A series of indole psammaplin A constructs were generated in a short synthetic sequence that starts with the functionalization of the C3 indole position with in situ generated nitrosoacrylate, and this is followed by protection of the beta-indole-alpha-oximinoesters, saponification, condensation with symmetrical diamines, and deprotection. Biochemical and cellular characterization using U937 and MCF-7 cells confirmed that many of these analogues displayed more potent actitivies than the parent natural product. Moreover, in addition to the reported HDAC and DNMT dual epigenetic inhibitory profile of the parent compound, some analogues, notably 4a (UVI5008), also inhibited the NAD(+)-dependent SIRT deacetylase enzymes. The SAR study provides structural insights into the mechanism of action of these multiple epigenetic ligands and paves the way for additional structural exploration to optimize their pharmacological profiles. Because of their multi(epi)target features and their action in ex vivo samples, the indole-based psammaplin A derivatives are attractive molecules for the modulation of epigenetic disorders.
[EN] The disclosure relates to the field of fusion proteins. In some aspects, the invention relates to artificial fusion proteins comprising cytochrome P450 enzymes linked to reductase enzymes and uses thereof. In some aspects, the disclosure relates to compounds produced by artificial cytochrome P450 enzymes. [FR] La présente invention se rapporte au domaine des protéines hybrides. Dans certains aspects, l'invention concerne des protéines hybrides artificielles comprenant des enzymes du cytochrome P450 liées à des enzymes réductase et leurs utilisations. Dans certains aspects, l'invention concerne des composés produits par des enzymes du cytochrome P450 artificielles.